This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Shrubs, with alternate stipulate coriaceous often evergreen leaves, and small white cymose or rarely solitary flowers. Calyx-tube adnate to the ovary, the limb 5-lobed, persistent. Petals 5, scarcely clawed. Stamens numerous; filaments mostly subulate. Ovary 2-5-celled or of 2-5 carpels, separate at the summit; styles 2-5; ovules 2 in each cavity or carpel, alike, erect. Pome ovoid, globose or top-shaped, the carpels bony when mature. [Name neo-Latin, Quince-star or Star-quince.]
About 20 species, natives of the Old World. Type species: Mespilus Cotoneaster L.
A shrub, 3°-8° high. Spines slender, 1/2'-1' long; leaves evergreen, glabrous on both sides, oval or slightly oblanceolate, crenulate, obtuse at the apex, usually narrowed at the base, somewhat shining above, 1'-2' long, short-petioled; cymes terminal, compound, many-flowered; pedicels and calyx pubescent; calyx-lobes ovate; flowers about 3" broad; styles 5; fruit scarlet, depressed-globose, about 2" high, bitter.
In thickets, escaped from cultivation about Philadelphia and Washington. Native of southern Europe and western Asia. Christ's- or Egyptian-thorn. May.